RFR: 8300968: Accessorize raw oop load in DeadCounterClosure

[Stefan Karlsson]

On Tue, 24 Jan 2023 15:02:23 GMT, Erik Österlund <eosterlund at openjdk.org> wrote:

> The DeadCounterClosure class uses raw loads to check for dead phantom oop* entries. This isn't completely GC independent (because generational ZGC colours null pointers as well). We should accessorize this access so that all GCs become happy.

Marked as reviewed by stefank (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/12168